Mathemagics

What Hacker News says

1. dritedNov 2019
   There's a book called Mathemagics with chapters which take about an hour to read which will teach you how to remember numbers and do mental arithmetic
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2. vitohuangFeb 2017
   'Mathemagics'

   https://www.amazon.co.uk/Mathemagics-Genius-without-Really-T...

   This is awesome book, it teach you all sort of tricks from 3 digits addition to 3 digits multiplication.

   I know its written for school teens, but still pretty helpful life skills.

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3. numpy-thagorasNov 2025
   The brute force got reduced down to fast heuristics, like Arthur Benjamin's Mathemagics.
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